Electric soldering tool



0d. 12, 1948. c KEPHART ET AL 2,451,29@

ELECTRIC SOLDERING TOOL Filed July 27, 1945 a Eg 27m??? m ziei z'ckaw IN V EN TORS,

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Patented Oct. 12, 1948 UNITED STATES PATENT orr ce ELECTRIC SOLDERING TOOL C. Paul Kephart, Jersey City, and Walter Erich J erichow, Far Hills, N. J.

Application July 27, 1945, Serial No. 607,280

3 Claims. 1

This invention relates to electric soldering tools of the resistance type, one of the objects being to provide a tool of this character which is simple in construction, readily adjustable, and, because of its peculiar configuration, is especially useful in assembly and repair work on radio transmitting and receiving sets, telephone installations and repairs, and repairs to the electrical systems of automobiles and aircraft.

A still further object is to provide a tool which can be utilized to advantage when making plumbing installations and repairs.

A still further object is to provide a soldering tool, the points of which are arranged in a pair, said points being movable at will toward or from each other and being located where they are easily seen while being applied to the work.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

In the accompanying drawing, the preferred form of the invention has been shown.

In said drawing:

Figure l is a perspective View of the tool.

Figure 2 is a section on line 2--2, Figure 1, said section being on an enlarged scale.

Figure 3 is a view partly in elevation and partly in section showing one of the tips and its connec tion.

Referring to the drawings by characters of reference, I and 2 designate opposed levers having offset intermediate portions 3 which are extended toward each other and overlap, these portions being connected by pivot pin or rivet 4. Handles 5 are mounted on the levers at one end while the other ends of the levers have downturned tongues 6 fastened to spacing blocks 1 formed of suitable insulating material. A spring 8 is interposed between and engages the levers I and 2 at points close to the handles 5 and serves normally to hold the blocks I pressed toward each other, this movement of the blocks being limited by a screw 9 which extends through one of the blocks 1, as'shown in Figure 2 and contacts the opposite block.

Arms Ill are secured fixedly to th respective blocks and are extended along substantially parallel lines substantially at right angles to the levers I and 2. These arms, preferably are formed of aluminum, have free end portions ex tended forwardly as at ii and are provided with pins l2 on which are mounted carbon tips 13. The tips can be seated at their bases in cups it bearing against the end portions ll of arms Ill.

As shown particularly in Figure 1, the carbon tips it have their inner sides preferably straight and flat, as indicated at it? while the opposite or outer faces of these tips are beveled as at it so that the tips thus are brought to broad points ll.

Wires [8 which can lead from a step-down transformer (not shown) can be extended through one of the handles and are insulated therefrom and from the levers. These wires are electrically joined, at [9, to ears 26 clamped between arms l0 and the blocks '3 so that the two arms In thus are included in opposite sides of a circuit.

The tips l3 are adapted to be moved toward each other when the handles 5 are permitted to move apart under the action of spring 3. Normally, however, when the two handles are grasped by the user, the tips are held apart so that the circuit is definitely broken between the tips. When these tips are applied to the work, the resistance set up will generate sufiicient heat to soften the solder located at or adjacent to the points of contact.

It will be noted that the movement of the tips toward each other can be adjustably limited by the screw 9.

What is claimed is:

1. An electric soldering tool including levers pivotally connected between their ends, handles at one end of each lever, insulating blocks joined to the other ends of the levers, yielding means for holding the blocks normally pressed toward each other, arms of conducting material secured at one end to the blocks and extended therefrom perpendicularly to the levers, said arms being substantially parallel, the other ends of the arms being respectively formed as fingers, and extended from the arms at an oblique angle thereto, the tips carried, by the respective fingers, and means for electrically connecting the arms to the respective sides of an electric circuit.

2. An electric soldering tool including levers pivotally connected intermediate their ends, the portions of the levers extending from the point of pivotal connection to the front ends thereof being substantially parallel and relatively closely spaced apart, insulating blocks secured to the front ends of the levers, means yieldably holding said blocks normally pressed toward each other, a screw threadable through one of said blocks against one face of the other block for limiting the movement of said blocks toward each other, arms of conducting material secured at one end to the blocks and downwardly extended therefrom in perpendicular relation to the levers, said arms being substantially parallel and closely spaced apart, the other ends of the arms being extended forwardly and at an oblique angle relative to the length of the arms, tips carried by the latter ends of the arms, and means for electrically connecting the arms to the respective sides of an electric circuit.

3. An electric soldering tool including levers pivotally connected intermediate their ends, the portions of the levers extending from the point of pivotal connection to the front ends thereof being substantially parallel and relatively closely spaced apart insulating blocks secured to the front -ends of the levers, means yieldably holding said blocks normally pressed toward each other, means carried by one of said blocks and cooperating with "the other block for adjustably limiting the movement of said blocks toward each other, arms of "conducting material secured at 25 4 one end to the blocks and downwardly extended therefrom in perpendicular relation to the levers, said arms being substantially parallel and closely spaced apart, the other ends of the arms being extended forwardly and at an oblique angle relative to the length of the arms, tips carried by the latter ends of the arms, and means for electrically connecting the arms to the respective sides of an electric circuit.

C. PAUL KEPI-IART. WALTER ERICH JERICHOW.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,142,306 Clemens June 8, 1915 20 1,869,448 Woodring Aug. 2, 1932 2,183,908 Gladitz Dec. 19, 1939 FOREIGN PATENTS Number Country Date 421,019 Great Britain Dec. 12, 1934 

